A 100% natural cotton surface with an allergy barrier that is a soft knit fabric backed with ultra-thin breathable, waterproof polyurethane membrane. Provides anti-microbial protection from allergen molecules of less than 1.0 micron. Scientifically researched and lab tested by Quorum Pharmaceuticals, a trusted leader in the field of allergy drugs. Fitted skirt sized to allow for shrinkage. Offers complete dust mite protection. Multi Use pad for bassinet, carriage, cradle and changing table. Size 27 x 36 inches. Satisfaction guaranteed or we replace it free of charge.